Re: [v10 01/12] drm: Add HDR source metadata property

["Ville Syrjälä" <ville.syrjala@linux.intel.com>]

On Tue, May 14, 2019 at 11:06:23PM +0530, Uma Shankar wrote:
> This patch adds a blob property to get HDR metadata
> information from userspace. This will be send as part
> of AVI Infoframe to panel.
> 
> It also implements get() and set() functions for HDR output
> metadata property.The blob data is received from userspace and
> saved in connector state, the same is returned as blob in get
> property call to userspace.
> 
> v2: Rebase and modified the metadata structure elements
> as per Ville's POC changes.
> 
> v3: No Change
> 
> v4: Addressed Shashank's review comments
> 
> v5: Rebase.
> 
> v6: Addressed Brian Starkey's review comments, defined
> new structure with header for dynamic metadata scalability.
> Merge get/set property functions for metadata in this patch.
> 
> v7: Addressed Jonas Karlman review comments and defined separate
> structure for infoframe to better align with CTA 861.G spec. Added
> Shashank's RB.
> 
> v8: Addressed Ville's review comments. Moved sink metadata structure
> out of uapi headers as suggested by Jonas Karlman.
> 
> v9: Rebase and addressed Jonas Karlman review comments.
> 
> Signed-off-by: Uma Shankar <uma.shankar@intel.com>
> Reviewed-by: Shashank Sharma <shashank.sharma@intel.com>
> ---
>  drivers/gpu/drm/drm_atomic.c      |  2 ++
>  drivers/gpu/drm/drm_atomic_uapi.c | 13 +++++++++++++
>  drivers/gpu/drm/drm_connector.c   |  6 ++++++
>  include/drm/drm_connector.h       | 11 +++++++++++
>  include/drm/drm_mode_config.h     |  7 +++++++
>  include/linux/hdmi.h              | 26 ++++++++++++++++++++++++++
>  include/uapi/drm/drm_mode.h       | 23 +++++++++++++++++++++++
>  7 files changed, 88 insertions(+)
> 
> diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
> index f4924cb..0d27195 100644
> --- a/drivers/gpu/drm/drm_atomic.c
> +++ b/drivers/gpu/drm/drm_atomic.c
> @@ -925,6 +925,8 @@ static void drm_atomic_connector_print_state(struct drm_printer *p,
>  
>  	drm_printf(p, "connector[%u]: %s\n", connector->base.id, connector->name);
>  	drm_printf(p, "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)");
> +	drm_printf(p, "\thdr_metadata_changed=%d\n",
> +		   state->hdr_metadata_changed);
>  
>  	if (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK)
>  		if (state->writeback_job && state->writeback_job->fb)
> diff --git a/drivers/gpu/drm/drm_atomic_uapi.c b/drivers/gpu/drm/drm_atomic_uapi.c
> index 4131e66..4aa82c91 100644
> --- a/drivers/gpu/drm/drm_atomic_uapi.c
> +++ b/drivers/gpu/drm/drm_atomic_uapi.c
> @@ -676,6 +676,8 @@ static int drm_atomic_connector_set_property(struct drm_connector *connector,
>  {
>  	struct drm_device *dev = connector->dev;
>  	struct drm_mode_config *config = &dev->mode_config;
> +	bool replaced = false;
> +	int ret;
>  
>  	if (property == config->prop_crtc_id) {
>  		struct drm_crtc *crtc = drm_crtc_find(dev, file_priv, val);
> @@ -726,6 +728,14 @@ static int drm_atomic_connector_set_property(struct drm_connector *connector,
>  		 */
>  		if (state->link_status != DRM_LINK_STATUS_GOOD)
>  			state->link_status = val;
> +	} else if (property == config->hdr_output_metadata_property) {
> +		ret = drm_atomic_replace_property_blob_from_id(dev,
> +				&state->hdr_output_metadata,
> +				val,
> +				-1, sizeof(struct hdr_output_metadata),

Those function arguments are nonsesne for a blob that isn't an array.

> +				&replaced);
> +		state->hdr_metadata_changed |= replaced;
> +		return ret;
>  	} else if (property == config->aspect_ratio_property) {
>  		state->picture_aspect_ratio = val;
>  	} else if (property == config->content_type_property) {
> @@ -814,6 +824,9 @@ static int drm_atomic_connector_set_property(struct drm_connector *connector,
>  		*val = state->colorspace;
>  	} else if (property == connector->scaling_mode_property) {
>  		*val = state->scaling_mode;
> +	} else if (property == config->hdr_output_metadata_property) {
> +		*val = state->hdr_output_metadata ?
> +			state->hdr_output_metadata->base.id : 0;
>  	} else if (property == config->content_protection_property) {
>  		*val = state->content_protection;
>  	} else if (property == config->writeback_fb_id_property) {
> diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
> index 11fcd25..c9ac8b9 100644
> --- a/drivers/gpu/drm/drm_connector.c
> +++ b/drivers/gpu/drm/drm_connector.c
> @@ -1051,6 +1051,12 @@ int drm_connector_create_standard_properties(struct drm_device *dev)
>  		return -ENOMEM;
>  	dev->mode_config.non_desktop_property = prop;
>  
> +	prop = drm_property_create(dev, DRM_MODE_PROP_BLOB,
> +				   "HDR_OUTPUT_METADATA", 0);
> +	if (!prop)
> +		return -ENOMEM;
> +	dev->mode_config.hdr_output_metadata_property = prop;
> +
>  	return 0;
>  }
>  
> diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
> index e257b87..54daa54 100644
> --- a/include/drm/drm_connector.h
> +++ b/include/drm/drm_connector.h
> @@ -603,6 +603,13 @@ struct drm_connector_state {
>  	 * and the connector bpc limitations obtained from edid.
>  	 */
>  	u8 max_bpc;
> +
> +	/**
> +	 * @hdr_output_metadata:
> +	 * DRM blob property for HDR output metadata
> +	 */
> +	struct drm_property_blob *hdr_output_metadata;
> +	u8 hdr_metadata_changed : 1;

I think the changed flag is now unused. Should be dropped if so.

>  };
>  
>  /**
> @@ -1237,6 +1244,10 @@ struct drm_connector {
>  	 * &drm_mode_config.connector_free_work.
>  	 */
>  	struct llist_node free_node;
> +
> +	/* HDR metdata */
> +	struct hdr_output_metadata hdr_output_metadata;
> +	struct hdr_sink_metadata hdr_sink_metadata;
>  };
>  
>  #define obj_to_connector(x) container_of(x, struct drm_connector, base)
> diff --git a/include/drm/drm_mode_config.h b/include/drm/drm_mode_config.h
> index 5764ee3..58278cc 100644
> --- a/include/drm/drm_mode_config.h
> +++ b/include/drm/drm_mode_config.h
> @@ -842,6 +842,13 @@ struct drm_mode_config {
>  	 */
>  	struct drm_property *content_protection_property;
>  
> +	/**
> +	 * hdr_output_metadata_property: Connector property containing hdr
> +	 * metatda. This will be provided by userspace compositors based
> +	 * on HDR content
> +	 */
> +	struct drm_property *hdr_output_metadata_property;
> +
>  	/* dumb ioctl parameters */
>  	uint32_t preferred_depth, prefer_shadow;
>  
> diff --git a/include/linux/hdmi.h b/include/linux/hdmi.h
> index 927ad64..6780476 100644
> --- a/include/linux/hdmi.h
> +++ b/include/linux/hdmi.h
> @@ -152,6 +152,16 @@ enum hdmi_content_type {
>  	HDMI_CONTENT_TYPE_GAME,
>  };
>  
> +enum hdmi_metadata_type {
> +	HDMI_STATIC_METADATA_TYPE1 = 1,
> +};
> +
> +enum hdmi_eotf {
> +	HDMI_EOTF_TRADITIONAL_GAMMA_SDR,
> +	HDMI_EOTF_TRADITIONAL_GAMMA_HDR,
> +	HDMI_EOTF_SMPTE_ST2084,
> +};
> +
>  struct hdmi_avi_infoframe {
>  	enum hdmi_infoframe_type type;
>  	unsigned char version;
> @@ -320,6 +330,22 @@ struct hdmi_vendor_infoframe {
>  	unsigned int s3d_ext_data;
>  };
>  
> +/* HDR Metadata as per 861.G spec */
> +struct hdr_static_metadata {
> +	__u8 eotf;
> +	__u8 metadata_type;
> +	__u16 max_cll;
> +	__u16 max_fall;
> +	__u16 min_cll;
> +};
> +
> +struct hdr_sink_metadata {
> +	__u32 metadata_type;
> +	union {
> +		struct hdr_static_metadata hdmi_type1;
> +	};
> +};
> +
>  int hdmi_vendor_infoframe_init(struct hdmi_vendor_infoframe *frame);
>  ssize_t hdmi_vendor_infoframe_pack(struct hdmi_vendor_infoframe *frame,
>  				   void *buffer, size_t size);
> diff --git a/include/uapi/drm/drm_mode.h b/include/uapi/drm/drm_mode.h
> index 83cd163..997a7e0 100644
> --- a/include/uapi/drm/drm_mode.h
> +++ b/include/uapi/drm/drm_mode.h
> @@ -630,6 +630,29 @@ struct drm_color_lut {
>  	__u16 reserved;
>  };
>  
> +/* HDR Metadata Infoframe as per 861.G spec */
> +struct hdr_metadata_infoframe {
> +	__u8 eotf;
> +	__u8 metadata_type;
> +	struct {
> +		__u16 x, y;
> +		} display_primaries[3];
> +	struct {
> +		__u16 x, y;
> +		} white_point;
> +	__u16 max_display_mastering_luminance;
> +	__u16 min_display_mastering_luminance;
> +	__u16 max_cll;
> +	__u16 max_fall;
> +};
> +
> +struct hdr_output_metadata {
> +	__u32 metadata_type;
> +	union {
> +		struct hdr_metadata_infoframe hdmi_metadata_type1;
> +	};
> +};
> +
>  #define DRM_MODE_PAGE_FLIP_EVENT 0x01
>  #define DRM_MODE_PAGE_FLIP_ASYNC 0x02
>  #define DRM_MODE_PAGE_FLIP_TARGET_ABSOLUTE 0x4
> -- 
> 1.9.1

-- 
Ville Syrjälä
Intel
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